That big dumb turret with the short derpy gun is so KV-2, and this is not strictly a bad thing.

On the other hand the flat top of the chassis is a little odd, doesn't really look like a tank. It just feels a little wrong. Might just be me? May also be the flat top combined with the raised turret ring. Could perhaps try dropping the turret ring a little (or sitting it near flush) and raising the engine deck behind the turret. Assuming you're interested in making drastic changes at this stage, of course.

Alternatively bring the turret ring down flush with the deck and then raise both the fighting compartment forward and engine deck aft up a little higher to give it a bit of a KV-5 silhouette.

Of note: Rear elevation looks good, front elevation feels a little top-heavy or tall, plan view is good (and has good lines front and rear), but the side elevation is particularly... not quite right.

The Sentinel class sentry tower is a modular armoured defence system seen across novan space. The system can be fully automated or semi automated with a single weapons operator. Designed to allow construction at various heights dependant on the local terrain or situation and with many different weapon load out options this is a versatile and rugged design that has seen great success during it’s time in service.

Set consists of two multi part sentry tower models with weapon options.